If you could convince some of your current users to share all/part of their books on the front page of your site, that would be wonderful - not just an example

If you could convince some of your current users to share all/part of their books on the front page of your site, that would be wonderful - not just an example of the product, but also an example of real users trusting you/facebook to gather their data. As per data, see if you could do it step-by-step. Ask for photos first, let users create something. As they use the product, offer to create more dynamic content and then ask for additional permissions. Hopefully that will get your users started and once they see some value will get them further engaged.